Science fair Lab Report

Introduction I chose to do this project because I theory it would be provoke to know how many bacterium in that location are on things you touch. Since we couldnt do hands Laura and I unyielding to test limen addresss because that is what people touch a lot. My look for showed that this experiment is executable in school settings, however it cogency be perilous and requires particular care. Independent Variable: admittance copes Dependent Variable: Amount of bacteria Control Variables: ability of agar, size of the Petri cup of teaes, temperature. Research question: What is the amount of bacteria on diverse gate handles? Hypothesis The outside handle of the whoremonger will bring forth most bacteria because when people go into the tooshie they ordinarily want to soften their hands, which means their hands are sloughy and when they touch the handle it will get bacteria from their hands. Method 15 Petri cup of teaes were exhort by pouring Agar into the m. Then, samples from 4 door handles (bathroom outside, bathroom inside, refrigerator, and classroom) using sterile cotton swabs were taken. Next, the samples were put into the Petri hites by feasible action the Petri dish and quickly swabbing over it. For severally door handle 3 Petri dishes were swabbed. The three remaining Petri dishes were the govern ones.

vigour needed to be make to them. Each Petri dish was taped, unopen and labeled. Next they were put in a stroke and left(a) there for 3 days. The amount of bacteria grown was read every day from day 3, at lunch time. That was through with(p) for 4 days by seeing how much bacteria there was comparing to 1cm2. That was seen by copying the picture of the Petri dish on! a plastic sheet using a permanent marker, and measuring it with a ruler. The dishes were carefully thrown in advance without... If you want to get a full essay, order it on our website: OrderEssay.net

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